Apparatus for burning fuel in furnaces.



E. M. BUN CE. APPARATUS FOR BURNING FUEL IN FURNACES.

APPLICATION FILED JAN. 26, 1907.

906, 194;. Patented Dec. 8, 1908.

2 SHEETS-SHEET 1.

witnesses Q v E. M. BUNCH. APPARATUS FOR BURNING FUEL IN FURNACES.

906,194.- Patented 1360.8, 190&

' 2 sums-sum 2.

UNITED srarss PATENT OFFICE.

EARL M. BUNOE, OF FENTON, MICHIGAN.

APPARATUS FOR'BURNING FUEL IN FI IRNAoEs.

Specification of Letters Patent.

Patented Dec. 8, 1908.

Application filed January 26, 1907. Serial No. 354,253.

To all whom it may concern:

complete combustion may be secured by the fuel with the air, and

thoroughly mixing whereby when the apparatus is used in connection witha rotary or other kiln for burning Bortland cement clinker the intensityof the flame orheat may be localized at various extreme lower end of thekiln, and said flame also may be directed towards any portion of theinternal surface of the kiln as well as axially thereof. v j

The invention consists in certain novelties of construction and[combinations of parts hereinafter set forth and claimed.

The accompanying drawings illustrate one example of the physicalembodiment 'of the invention constructed and arranged accordmg to thebest of the several modes I have so far devised for the practicalapplication.

of the principle.

Figure 1 is a side view in elevation of the apparatus showing its use inconnection with a rotary kiln. Fig. 1.. Fig. 3 is an enlarged end view.Fig. e shows by a view in perspective the means fer adjusting the pipeshorizontally. Fig. 5 shows by a view in perspective part of thetogglelever mechanism for; ad usting a pipe vertically. Referring to theseveral figures, the numeral 1 designates the lower portion or end of arotary kiln which may be of any well known construction and be supportedand revolved in any suitable way well'kn'own in the art; 2, a housing orhood'of a well known type supported upon wheels and having an openingupon one vertical side which in this instance receives or matches thetubular end of the rotary kiln; 3, two castings set in the wall of thehood and extending through the fire brick, indicatedby dotted-lines,each casting being alhollow truncated cone in shape and the axial linesof the two cones the cones; 6, the main points or places inwardly fromthe F g 2 is a top plan view of loosely journaled; 26, a fixed disposedat an angle to each other; 4, fuel discharge pipes with their endslocated wlthin and slightly projecting beyond the smaller ends of thetruncated cones, thus forming swivel connections with said cones; 5, re-

taining bands or rings upon the ends of the pipes for preventing theirwithdrawal from blast pipe connected with a blower and source of fuelsupply; 7, 7, the two branches leading from the main blast pipe; 8,continuation's of the branches to the fuel discharge pipes; 9, flexiblehose connectin the several pipes whereby three universal joints areprovided between each branch of the main pipe and the fuel dischargepipe; 10, rods for supporting the end of the main pipe and the severalbranch pipes; 11, a damper located within the main pipe at its 13, aperforated lever arm; 14:,a slotted semi-circular bearing supported bythe main pipe; 15, a bolt passed through the slot in the circle and theend of the lever; 16, a

a channel iron winged nut on the bolt; 17, section-at the rear top edgeof the hood occupying a horizontal position; 18, a' channel ironsecuredat the front top edge of the hood; 19, two channel irons secured to theends of channels 17 and 18 and with their sections of pipe constitutingfree ends extended rearwardly a suitable distance from the hood; 20, ahorizontally disposed Z-bar, located below the truncated cones; 21, abent strap secured to the Z-bar; 22, two metallic barsspaced apart andwith their front ends secured to the strap 21 in any way; 23, twoobliquely disposed angle irons extending from the ends'of the channels19 to the ends of the bars 22, and which support the shaft with a handwheel; 25, a perforated block which supports the hand wheel end of theshaft and within which the shaft is blockhaving a bearing for the end ofthe shaft and within which't-he end of the shaft turns; 27 a movableblock with. a threaded hole for the reception of the threaded portion ofthe shaft; 28,,two toggle levers; 29, a journal by which the meetingends of the levers are pivoted to the movable block; 30, pivotal jointswhich connect the ends of the levers with the universal joints at theends of the fuel discharge pipes; 31, toggle levers pivoted attheirmeeting ends upon a bolt 82 which is pro-.

vided with a winged nut 33, as shown; 34,

75 junction with the branches; 12, the shaft; 7,

- shifted from the place A to a position at one an operating handlepivoted upon the bolt 32 at the meeting ends of the levers; 35, the

pivotal joints which unite the outer levers to the channel bars 19 inany suitable way; and 36, the pivotaljoints which unite t e lower leversto the universal joints or connections at the ends of the fuel dischargepipes. Any suitable type of blower and means for supplying fine fuel,suchas pulverized coal,

to the main blast pipe 6 may be employed and such blowers and meansbeing well known in the art I have not illustrated or described thesame. 1

The mode of operation is as follows: As-

, suming the fuel discharge pipes 4, 4, to be in the relative positionsshown by Fig. 2 and powdered fuel mixed with air to be projected fromthedischarge pipes, the two currents or streams will meet at point or placeA where the fuel and air will become thoroughly coinmingled and the twocurrents change directions and become united to form a single currentextending ina substantially I will be delivered from one of thedischarge pipes than from the other, the flame will be side of avertical plane passing through the l nes. BB. Obviously the flame canthus be shifted from side to side of the internal surface of the-kiln asoccasion may demand. To change the place A of the most intense heat to aposition nearer the lower end of the k1ln,.as at (1., the threaded shaft24 is revolved, the toggle levers 28,28 operated, and the dischargepipes 4, 4, moved apart at their free ends so the air and fuel deliverewill meet at the place G.

To localize the. flame and most intense heat inwardlyat any place on theline B-B' from the lower end of the kiln the free ends of the dischargepipes 4, 4, are moved towards each other by the toggle lever mechanismand the' currents or streams of air and fuel thus caused to meet at thedesired place. When the discharge pipes 4, 4, coincide in direction withthe lines DD the place of most intense heat will be located far withinthe kiln at the meeting point or place of the two streams or currents ofair and fuel. As previously explained in connection with the place A,the flame may be shifted from-side to side of the internal surface ofthe kiln from the point or place wherever in the plane of the line B--Bthe two currents of fuel and air may be caused to unite or meet. By themanipulation of the toggle levers 31, 31, the free ends of the dischargepipes may be moved so that the common flame will be localized at the topinternal surface or bottom internal surface of the kiln, near the lowerend of the kiln, as indicated by the dotted lines E and F, or it may belocalized at the top and bottom internal surfaces at places somedistance within the kiln.

It will be observed that each discharge pipe 4 forms at one end with thesurface bounding the smaller opening in a trun cated cone casting aswivel joint, or universal joint, and that the opposite end can be movedthrough practically the circumference of a circle so that the current offuel and air may be directed towards any portion of the internal surfaceof the kiln or axially thereof. Under some conditions it may bedesirable to use a single dischargepipe thus swiveled at one end in thewall of the hood, but two such pipes are preferably employed and thecurrents of fuel and air or flames united to form onecurrent or flameinasmuch as by bringing the currents of fuel and air together the sameare more thoroughly mixed and more .complete combustion with a greaterheat results. Again, by'

bringing the two flames or currents of air and fuel together at an anglethe heat may be localized near the lower end of the kiln and in this andother locations there is less tendency for the flame and heat to swiftlypass through the kiln to the stack before, theheat has been transmittedto the material under treatment.

'The advantages secured by the use of my improved apparatus inconnection with burning raw materials into Portland cement clinker areobvious. With devices now in use the length of the clinkering zone isvery limited and the raw material frequently passesthe zone withoutbeing thorougihly burned, under whichcircumstances the iln must bestopped and the unburned material driven back. By the use of myapparatus the clinkering zone can be brought to the lower end of thekiln or the heat elsewhere localized and the flame directed upon thematerial not thoroughly burned. In 'fact the point or zone of clinkeringis under the control of the operator at alltimes. Furthermore, theformation of rings may be prevented or the same readily burned off whenformed as the flame can be directed to any point within the lowerportion of the kiln and the heat there-intensified.

From the fore oing description taken in connection with t e drawings, itis clear that -1 have produced an apparatus whereby a I do not intend tolimit the scope of the invention to such specificmeans, as equivalentmeans may be employed to perform the same or analogous functions, forinstance, the fuel discharge pipes may be bodily movable at the ends inlieu of having swiveledor universal joint connections with the two truncated cones, a different type of flexible oint be selected, other meansbe used to move the discharge pipes simultaneously or successively, and.two main supply or blast pipes each having adamper be substituted forthe main blast pipe with branches as herein illustrated.

lVhat I claim is:' v

1. The combination with a furnace, of a discharge pipe swiveled oruni'versally jointed atits. front 'end in the wall of the furnace andbodily movable at the rear end to positions within the arc of a circle,and means embracing a pipe universally jointed to the rear end of thedischarge pipe for delivering air-and fuel to said discharge pipe.

2. The-combination with a furnace, of a discharge pipe swiveled oruniversally jointed at its front end and movable at the rear end; meansfor moving said pipe; and means embracing a pipe universally ointed-atone end to the rear end of the discharge pipe for delivering fuel and.air through said pipe to the furnace.

The combination with a furnace, of means for delivering two streams ofair and fuel into the furnace so they will meet, change theirdirections, become thoroughly comn'lin'gled and form practically onestream;

'and means for changing the meeting point or place of the two streamswithin the furnace.

l. The combination with a rotary kiln, of means for delivering aplurality .of streams of commingled air and fuel against each or oneanother so as to. form practically one stream; and means for localizingthe stream so formed at different places wi hin the in-,

terior of the kiln.

5. The combination with a rotary kiln,-of means for delivering twostreams of air and fuel into the kiln so they will unite and formpractically one stream; and meals for forcing the said stream to oneside of the meeting place of the said two streams of air and fuel.

6. The combination with a furnace, of two movable fuel discharge pipes,means for supplying fuel and air to the pipes andrmea-ns for supportingthem in different positions the two streams of air and fuel may becaused to meet at different points or places within the furnace.

' 8. The combination with a furnace, of two fuel discharge pipesangularly disposed each to the other; means for supporting the same;means for supplying fuel and air to the pipes; and means for adjustingthe pipes vertically so the flame may be directed upwardly or downwardlywithin the furnace.

9. The combination avith a furnace, of two fuel discharge pipes; meansfor supplying fuel and air to the pipes; and means for adjusting thepipes both vertically and horizontally so the two streams of fuel andair delivered from the pipes will meet at a plurality of points orplaces within the furnace and form one stream.

10. The combination witha kiln, of two fuel discharge pipes eachswiveled at one end and movable at the other end; means for adjustingthe pipes to angular positions; and means for supplying fuel and air tothe same.

11. The combination with a kiln, of two fuel discharge pipes angularlydisposed each to the other so the streams of fuel and air will meet toform one stream; means forsupplying fuel and air to the pipes;-andmeansfor delivering more'fuel to one of the pipes than to. the other,for the purpose set forth.

12. The combination with a kiln, of two fuel discharge pipes angularlydisposed each to theother so the streams of air and fuel will meet,change their directions, become thoroughly commingled, and form onestream; and means for adjusting the pipes to different angularpositions, for the purpose set forth.

18. The combination with a rotary kiln, of two movable fuel dischargepipes angularly disposed each to the other so the streams of air and.fuel will unite, change their directions, become thoroughly commingled,and form one stream; and means for adjusting the said pipes and holdingthem in relative adjusted'positions.

14. The combination with a rotary kiln, of two movable fuel dischargepipes angu+ larly disposed each to the other so the streams of fueldischarged will be united to form. one stream; fuel supply pipes joinedlarly disposed each to'the other; fuel supply pipes each flexiblyjointed to a discharge pipe at one end and to another supply pipe at theopposite end; and means for adjusting the discharge pipes.

16. The combination with a rotary kiln,

of two movable fuel supply pipes angularly disposed each to the other sothe streams'of fuel and air discharged will unite, change theirdirections, become thoroughly commingled, and form one stream; means forsupplying fuel and air; and toggle lever mechanism for horizontallyadjusting said pipes to different angular. positions.

17. The combination witha rotary kiln, of two movable fuel supply pipessingularly disposed each to the other so the streams of fuel and airdischarged will unite, change their directions, become thoroughlycommingled, and form one stream; means for supplying fuel and air; andtoggle levi mechanism for vertically 'adjustmg said pipes to differentpositions.

18. The combination with a rotary kiln, I

delivery pipe; means for supplying air and fuel to the pipes; and meansfor moving the tions.

19. The combination with a rotary kiln, of two fuel discharge pipes eachswiveled at one end in the wall of a hood or housing and discharge pipesto different angular posifiexibly united at the opposite end to amovable fuel delivery pipe; means for supplying air and fuel to thepipes; and means for moving the discharge pipes to different an- 1 gularpositions.

In testimony whereof I affix my signature in presence of two witnesses.

' EARL M. BUNOE. Witnesses: V

R. B. RENWIGK, JOHN HORRELL.

